National Aeronautics and Space Administration . ... Leland D. Melvin . ... NASA EXPERIENCE: б  Selected by NASA JSC in June 1998, Mr. Melvin reported for training in August 1998.б  Astronaut Candidate Training included orientation briefings and tours, numerous scientific and technical briefings, intensive instruction in Shuttle and International Space Station systems, physiological training and ground school to prepare for T-38 flight training, as well as learning water and wilderness ...